Lubrication



April 20, l943- l J. v. TERc-ao 2,439,954

LUBRICATION Filed April 3, 1945 atentecl pr. j270, Q

LUBRICATION John V. Ter-cho, Turtle Creek, Pa., assignor to WestinghouseElectric CorporatiomEast Pittsburgh, Pa. a corporation of PennsylvaniaApplication April 3, 1945, Serial No. 586,289 l My invention relates tonood-lubricating means for an electric motor or other lubricated device,and it has particular relation to a lubricating means in which ashaft-driven pump, mounted at one end of the motor, supplies oil underpressure to the bearings at both ends of the motor.

Heretofore, the difference in the lengths of the oil-pipe lines from thepump to the bearings at the two ends of the machine has not onlyresulted in different oil-pressures at the two bearings, because of thedifference in the pressuredrops in the respective oil-pipe lines, but ithas also resulted in a considerable number of special pipe-connections'.

The object of my present invention is to `provide an oil-tank which iscentrally disposed alongside of the motor or other lubricated device,said oil-tank having both an oil-reservoir and a pressure-oil chamberfor receiving the oil, under pressure, which is delivered by the pumpfromvr the machine, and the overflow-oil is returnedl from both bearingsto the oil-reservoir partof the tank. In this way, I not only equalizethe s claims. (c1. isi- 6) In accordance with my invention, an oil-tankv8 is centrally disposed alongside of the motor, and this oil-tank has ahorizontal partition il which divides the tank into an upperoil-reservoir II and a lower pressure-oil chamber I2, in the illustratedform'of my invention. An oil-line I3 extends to the pump 'I from theoil-reservoir II, while a second oil-line I4 extends from the pump I tothe pressure-oil chamber I2. Some sort of pressure-relievingoil-passageway is provided, for discharging some of the oil pumped bythe pump 1, so as to maintain a predetermined oil-pressure (assumingaconstant-speed motor), depending upon the size of the pressure-relievingpassageway. In the particular form of invention which I haveillustrated, the pressure-relieving cilpassageway is provided by meansof a hole *I5Y inthe partition 9, and preferably this hole is protectedby a spaced balile I6, or other means for horizontally directing the oilwhich is discharged through said hole I5, so as to prevent the oil fromspurting up and splashing against pressure of the oil which is suppliedto the two bearings, but I also avoid all of the special pipeconnectionswhich have heretofore been required' for the oil-piping.

With the foregoing and other objects in view, my invention consists inthe combinations, apparatus, parts, and methods hereinafter describedand claimed, and illustrated in the drawing, wherein: i

Figure 1 is an end View of the pump-end of a motor embodying myinvention,

Fig. 2 is a side elevational view thereof, with parts broken away toshow the tank-c cnstruc-FY tion, and

Fig. 3 is a' longitudinal sectional view'of the bearing. l

I have illustrated my invention in a preferred application thereof, inconnection with a 200 horse-power, horizontal-shaft, electric motorwhich is intended for use on shipboard, where the rolling of the shippresents bearing-lubricating problems, by reason of the tilting of theshaft, usually resulting in the requirement of floodlubrication. Themotor is shown at 4. It has an approximately horizontal rotating shaft 5which is supported by means of two bearings 6, one at each end of themachine. At one end of the machine, there is disposed a shaft-drivenVpump 'I for pumping oil for the bearings.

the oil-tank cover I'I andproducing foam and oil-mist which would resultin oil-leakage. The baffle I'I causes the oil-stream to be broken up inthe bottom of the oil-reservoir II, thus preventing foam.

From the respective ends of the pressure-oil chamber I2, two oil-linesI8 run to the respective bearings 6, where they discharge oil, underpressure, to the tops of the bearings. An oildrain line I9 extends fromeach of the bearinghousings to the oil-reservoir II.

While my invention is applicable to any floodlubricated bearing, ithasbeen illustrated in con-l nection with a combination oil-ringbearing'and nood-lubrication bearing which constitutes the.subject-matter of my application Serial No., 586,290, -lled'concurrently herewith. As shown,

4o-more in detail in Fig. 3 of the accompanying" drawing, this bearingcomprises a sleeve-bearing 2| for journalling the shaft. Each bearinghas: a, housing 24 having an oil-chamber 25 in its lower portion. Eachbearing also has an cil-ring 2li.'-` for lifting oil from theoil-chamber 25 to the topy of the journal. The top of thebearing-housing-` 24 is provided with a slot 21 through which theJoil-ring 26 may be inserted or removed, and the' slot is closed by aslot-cover 28, which ha-s a'. downwardly depending oil-pipe 3|,extendinginto close juxtaposition to the top of the oil-ring '26, so asto serve as a keeper for preventing theoil-ring from jumping out ofplace. The oil-line I8, which supplies oil, under pressure, to thebearing is coupled to the top of the slot-cover 28 for

